没错。疯牛病虽然也是人为因素造成,但

回答: It seems that you enjoy auguring with megzlady2008-09-13 18:24:45

是事发后通过研究才了解到起因。
这跟明知故犯的毒奶粉根本是两回事。

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Mad cow disease is infectious disease. -Pathologist- 给 Pathologist 发送悄悄话 (10662 bytes) () 09/13/2008 postreply 19:12:09

嗯又长了知识:-) -jas07- 给 jas07 发送悄悄话 (0 bytes) () 09/13/2008 postreply 19:17:40

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